Ignition device for oil burners



Feb. 11, 1947. J. E. NORTH 2,415,519

IGNITION DEVICE FOR OIL BURNERS Filed Oct. 11, 1943 INVEN TOR.

Patented Feb. 11, 1947 FFICE IGNITION DEVICE FQR OIL BUBNEBLS James E. North, Warrenville, 111., assignor to Sears, Roebuck and 00., Chicago, Ill., 2. corporation of New York 1 Claim.

This invention relates to igniting means for oil burners and it is particularly designed for use in combination ranges which include oil burners and gas burners and are therefore equipped with fuel supply means providing both oil and gas.

One object of the invention is to provide new and improved ignition means for an oil burner.

Another object of the invention is to provide an arrangement for lighting an oil burner by means of a gas flame together with means for lighting the gas flame from a point remote from the gas burner itself.

More specifically, it is an object of the invention to provide means for lighting the oil burners of a combination range by employing the continuously burning gas pilot which is located in the range remote from the oil burners and providing a flash tube leading from the pilot to a point adjacent a gas burner which in turn will direct the flame toward the oil burner to ignite it.

Other objects and advantages of the invention will appear from the following description taken in connection with the drawing, in which The sole figure is a diagrammatic perspective view indicating the general arrangement of igniting means embodying this invention as installed in a combination range.

While there is shown and described herein certain specific structure embodying the invention, it will be manifest to those skilled in the art that various modifications rearrangements of the parts may be Without departing from the scope of the invention and that the same is not limited to the particular forms herein disclosed, except insofar as indicated by the appended claim.

Referring first to the figure, it may be under stood that the broken outlines 5 indicate diagrammatically the general form of the outer casing or walls of a combination range. Four gas burners 2 are shown located in the top of the range and serviced by a gas-fed pilot light at 3, the supply pipe for the pilot being sh-OWn at d branching from the gas sup-ply pipe 5. At any convenient location within the casin i there is provided an oil tank 6 with a supply pipe 1 connected to feed pipes 8 and 9, each having a control valve it; said pipes lead respectively to the two oil burners ii l2 located in one end of the casing l. These burners are of the conventional type including a plurality of spaced concentric cylinders and provided with annular wicks disposed between certain of said cylinders but not appearing in the figure. Such burners can be started by means of a lighted taper thrust down into the burner structure and in some cases the outer cylinders are tilted upwardly to give access to the wicks, but such methods are inconvenient and tend to produce offending odors and fumes. Accordingly the figure shows a gas burner is located inside the oil burner structure at a suitable position for igniting the oil by means of a small gas flame. The gas burners I3 are fed from a pipe M which is connected directly to the gas feed pipe 5 and controlled by a valve l5 of the push-button type which is normally closed by a spring but opened for a limited period by pressure on the exposed button l5a of the valve fitting.

In addition to the gas burners E3, the figure shows a branch pipe I6 leading from the pipe I l and supporting a double burner 11 having jets directed respectively toward the oil burners H and I2. The pipe it also supports a bent tube It terminating in a mixing nozzle I9 which is spaced from the end of a flash tube 2!! so as to feed an explosive mixture into the tube when the valve I5 is opened. This mixture flows through the tube 28 which leads to a point adjacent the pilot light 3 in the top of the stove and the mixture of air and gas in the tube 25 is then ignited and flashes back through the tube 20 to ignite the gas at the tips of the double burner ll. The tongues of flame projected in opposite directions from the burner ll then ignite the gas flowing from the burners I 3, I3 within the oil burner structures and these burners in turn light the oil burners. All this takes place in the course of a few seconds and since the pilot light 3 is kept burning continuously, the oil burners II and I 2 may thus be lighted almost instantaneously at any time when their use is desired. It will be understood that immediately upon the release of the valve button l5a, the gas valve IE will be closed, cutting off the further supply of gas and thus extinguishing the gas flames at the burners l3 and H.

In order to insure the propagation of the flame through the flash tube from the pilot 3 to the gap between the end of the tube and the feed nozzle 59, it has been found desirable to provide the tube at with a series of holes 2 i. As the flame travels back from the pilot 3 through the tube, the resulting products of combustion are swept ahead and tend to accumulate in the tube 20 so as to smother the flame before it reaches the lower end of said tube. The holes 2! permit these burned gases to escape from the tube so that they do not impede the progress of the flame therein. The nozzle H! is of substantially standard construction and includes intake ports 22 for primary air which is entrained by the flow of gas from the pipe [8 and is therefore fed into the flash tube 20 with the gas itself. Additional air is entrained by the flow from the nozzle into the open end of the tube 29 and some of the air already in the tube will obviously become intermingled with the gas as it rises toward the pilot light so as to produce a readily combustible mixture by which the flame is carried back for igniting the gas at the burner 17.

I claim:

In a combination range which includes a pair of oil burners, an oil supply pipe therefor and a gas supply pipe, a gas jet burner disposed between the oil burner structures with J'ets directed at both of them, a continuously burning gas pilot remote from the oil burners, a flash tube extending from said pilot burner to a point adjacent the gas jet burner, a gas feed nozzle directed into the end of said tube adjacent the gas jet burner, and a pair 01f additional gas burners isposed respectively within the oil burner structures, together with valve means arranged to connect the gas supply pipe to said nozzle and to said jet burner and to said additional gas burners simultaneously.

JAMES E. NORTH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,268,444 DeNicola Dec. 30, 1941 1,961,086 Sherman, et al May 29, 1939 2,183,273 Baker Dec. 12, 1939 2,248,991 Hadengren July 15, 1941 800,411 Stafiord Sept. 26, 1905 867,741 Mills Oct. 8, 1907 2,048,065 Gauger July 21, 1936 2,109,399 Meacham, et a1 Feb. 22, 1938 

